Category: Extremes affecting Antarctica

Heat wave occuring from August 30 2025 to September 22 2025 at -72.0°S 187.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 24 days

Time span: August 30 2025 to September 22 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 10.9 °C
  • Mean temperature: -11.1 °C
  • Maximum temperature anomaly: 27.2 °C
  • Maximum temperature: 7.3 °C

Event center: -72.0°S 187.5°E

Area affected: 6231859 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Aug-30_to_2025-Sep-22_187.5_-72.0

Cold spell occuring from August 24 2025 to September 01 2025 at -57.5°S 149.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica
  • Australia
  • New Zealand

Duration: 9 days

Time span: August 24 2025 to September 01 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.4 °C
  • Mean temperature: -0.4 °C
  • Minimum temperature anomaly: -6.1 °C
  • Minimum temperature: -9.4 °C

Event center: -57.5°S 149.0°E

Area affected: 3060801 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-24_to_2025-Sep-01_149.0_-57.5

Cold spell occuring from August 24 2025 to August 28 2025 at -63.5°S 320.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 5 days

Time span: August 24 2025 to August 28 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -9.2 °C
  • Mean temperature: -27.4 °C
  • Minimum temperature anomaly: -11.5 °C
  • Minimum temperature: -30.7 °C

Event center: -63.5°S 320.0°E

Area affected: 249667 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-24_to_2025-Aug-28_320.0_-63.5

Cold spell occuring from August 16 2025 to August 23 2025 at -68.5°S 155.5°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 8 days

Time span: August 16 2025 to August 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -10.7 °C
  • Mean temperature: -38.5 °C
  • Minimum temperature anomaly: -13.0 °C
  • Minimum temperature: -49.8 °C

Event center: -68.5°S 155.5°E

Area affected: 62927 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-16_to_2025-Aug-23_155.5_-68.5

Cold spell occuring from August 14 2025 to August 23 2025 at -70.0°S 161.5°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 10 days

Time span: August 14 2025 to August 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -8.1 °C
  • Mean temperature: -29.6 °C
  • Minimum temperature anomaly: -12.2 °C
  • Minimum temperature: -39.8 °C

Event center: -70.0°S 161.5°E

Area affected: 62542 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-14_to_2025-Aug-23_161.5_-70.0

Cold spell occuring from August 12 2025 to August 23 2025 at -65.5°S 64.0°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 12 days

Time span: August 12 2025 to August 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -7.7 °C
  • Mean temperature: -18.4 °C
  • Minimum temperature anomaly: -15.1 °C
  • Minimum temperature: -51.7 °C

Event center: -65.5°S 64.0°E

Area affected: 2519463 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-12_to_2025-Aug-23_64.0_-65.5

Heat wave occuring from August 10 2025 to September 05 2025 at -79.0°S 142.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 27 days

Time span: August 10 2025 to September 05 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 11.9 °C
  • Mean temperature: -30.1 °C
  • Maximum temperature anomaly: 28.7 °C
  • Maximum temperature: 6.5 °C

Event center: -79.0°S 142.0°E

Area affected: 10649880 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Aug-10_to_2025-Sep-05_142.0_-79.0

Cold spell occuring from August 09 2025 to August 14 2025 at -77.0°S 234.5°E

Download data: JSON

Event type: Cold spell

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 6 days

Time span: August 09 2025 to August 14 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -11.4 °C
  • Mean temperature: -44.8 °C
  • Minimum temperature anomaly: -17.7 °C
  • Minimum temperature: -51.4 °C

Event center: -77.0°S 234.5°E

Area affected: 87065 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Cold_spell_2025-Aug-09_to_2025-Aug-14_234.5_-77.0

Heat wave occuring from August 08 2025 to August 13 2025 at -69.0°S 124.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 6 days

Time span: August 08 2025 to August 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 9.2 °C
  • Mean temperature: -23.8 °C
  • Maximum temperature anomaly: 13.6 °C
  • Maximum temperature: -4.6 °C

Event center: -69.0°S 124.5°E

Area affected: 321851 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Aug-08_to_2025-Aug-13_124.5_-69.0

Heat wave occuring from August 07 2025 to August 10 2025 at -65.5°S 91.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Antarctica

Duration: 4 days

Time span: August 07 2025 to August 10 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 9.0 °C
  • Mean temperature: -9.9 °C
  • Maximum temperature anomaly: 12.8 °C
  • Maximum temperature: -4.5 °C

Event center: -65.5°S 91.5°E

Area affected: 123839 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Aug-07_to_2025-Aug-10_91.5_-65.5